national metrology institutes – Page 5

NPL makes history with first UK optical clock to contribute to determining International Atomic Time – NPL

September 28, 2023 Office

Calculating TAI is a major resource for determining Coordinated Universal Time (UTC), the shared international reference time scale that countries worldwide use to synchronise clocks. Without UTC in place as the world’s agreed consistent time-base, […]

NIST Demonstrates a New ‘Primary Standard’ for Measuring Ultralow Pressures | NIST

September 26, 2023 Office

A vacuum chamber is never perfectly empty. A small number of atoms or molecules always remain, and measuring the tiny pressures they exert is critical. For instance, semiconductor manufacturers create microchips in vacuum chambers that […]

Domestic gas meters suitable for hydrogen – PTB.de

July 19, 2023 Office

PTBnews 2.2023 As part of preparations for pilot projects in which private households will be supplied with hydrogen via the normal natural gas grid, PTB investigated whether the devices currently used for natural gas metering […]

How effective are solar modules? – PTB.de

July 19, 2023 Office

PTBnews 2.2023 At PTB’s Competence Center for Photovoltaics, a new measuring facility has been developed with which the performance of solar modules under standard test conditions can be determined with much greater accuracy compared to […]

Confidence in virtual flowmeters – PTB.de

May 17, 2023 Office

PTBnews 2.2023 A method for calculating the simulation uncertainty of a virtual ultrasonic flowmeter has been developed in PTB’s VirtMet Competence Center. This method allows calibration factors relevant to fluid mechanics to be calculated for […]

Calibrating digital electrical energy meters – PTB.de

April 18, 2023 Office

PTB-News 1.2023 – Real-time capable controlling and monitoring systems are necessary when it comes to ensuring the stability of future electrical distribution and transmission grids. Also required are meters that can accurately and with high […]

Sounding Out a New Way to Measure Gas Flow | NIST News

March 31, 2023 Office

Researchers at NIST have developed a new — and sound — way to accurately measure the rate at which gas flows in and out of a vessel. The technique, which uses acoustic waves to determine […]

Improving confidence in measurement data from state-of-the-art PTR-MS – NPL

March 22, 2023 Office

13 Mar 2023, NPL News NPL and the University of Utrecht, Netherlands have collaborated to develop new SI-traceable gas reference materials and a fast calibration approach to improve the quantification and comparability of proton-transfer reaction mass […]